Last night a friend asked me for input on why this little snippet of code won't work.



This turned out to be a real bit of frustration as z.xz and its ilk refused to accept anything, and I do mean anything. This works of course, but I'd really like to know why it refused all those seemingly reasonable alternatives.

float f = min(z.x + z.z, 0.0);
z.x -= f;
z.z -= f;

AdamNixon
This works of course, but I'd really like to know why it refused all those seemingly reasonable alternatives.

Because they aren't valid. VEX isn't glsl. Double subscript is for matrix row/column access.